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Search results for: DI-SPME
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temilavoro.it - sinossi internet di diritto del lavoro e della sicurezza sociale
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Determination of pharmaceutical residues in drinking water in Poland using a new SPE-GC-MS(SIM) method based on Speedisk extraction disks and DIMETRIS derivatization
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Toward Mechanosynthesis of Diamondoid Structures: X. Commercial Capped CNT SPM Tip as Nowadays Available C2 Dimer Placement Tool for Tip-Based Nanofabrication
PublicationAccording to Drexler, advanced mechanosynthesis will employ advanced nano-machines, but advanced nano-machines will themselves be products of advanced mechanosynthesis. This circular relationship must be broken via TBN technology development. In this article, the possibility of using easily available commercial CNT tips to assemble carbon-based intermediate generations of nano-devices is considered. Mechanosynthesis of a target...
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Determination of phenylbutazone, sulfamethazine, carbendazim and linuron using a novel pine bark biosorbent for solid-phase extraction (SPE) with high-performance liquid chromatography (HPLC)
PublicationThe paper presents a novel pine bark based biosorbent for solid-phase extraction (SPE). The morphology and composition of the pine bark were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The biosorbent was used for the preparation of wastewater for the determination of phenylbutazone, sulfamethazine, carbendazim, and linuron by high performance liquid chromatography with...
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Die reaktion von tBu2P-P=P(Me)tBu2 mit [Fe2(CO)9] und [(n2-C8H14)2Fe(CO)3]
PublicationFosfanofosfinidenofosforan reaguje z nonakarbonylkiem diżelaza oraz z trikarbonylo(diokten)żelazem(0) dając mieszaniny produktów z których udało się wyizolować pochodne będące kompleksami dimeru di(tert)butylo-fosfinofosfini-denu i centrów koordynacji Fe(0).
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Effect of Simultaneous Valve Closures in Hydraulic Piping Systems
PublicationThe paper investigates wave interference (between pressure waves) occurring in simple hydraulic systems. Water hammer was induced by simultaneous closure of three valves located at the reservoirs of a “Y” type hydraulic system. Numerical simulations were carried out with the help of the freeware computer package Allievi enabling the reader to replicate results in a direct manner. The influence of the following quantities has been...
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Badania nad rozdzielaniem grupowym technikami sorpcji i chromatografii. Część I – Wykorzystanie chromatografii cienkowarstwowej (TLC) dla doboru warunków rozdzielania tłuszczów i produktów ich konwersji technikami kolumnowymi.
PublicationPrzeprowadzono badania wyjaśniające wpływ eluentu oraz fazy stacjonarnej na wartość parametrów elucji mono-, di-, triacylogliceroli oraz wolnych kwasów tłuszczowych, eluowanych w warunkach cienkowarstwowej chromatografii cieczowej (TLC). Celowo wykorzystano sorbenty inne niż kopolimer styrenu i di-winylobenzenu (SDVB). Starano się dobrać taki eluent, aby możliwe było rozdzielanie tłuszczów za pomocą chromatografii wykluczania...
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Front Matter: Volume 8703
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Front Matter: Volume 7502
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Front Matter: Volume 8454
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Front Matter: Volume 8010
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Front Matter: Volume 8702
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Front Matter for Volume 7745
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Front Matter: Volume 9290
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Front Matter: Volume 8008
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The XRD diffraction patterns of (La0.3Sr0.6Ce0.1)0.9FexTi(1-x)O3-δ (x=0.1, 0.2 and 0.3) materials after reduction at 900 deg.C in hydrogen
Open Research DataThe (La0.3Sr0.6Ce0.1)0.9FexTi(1-x)O3-δ (x=0.1, 0.2 and 0.3) materials were synthesized via the Pechini method. First, the reagents in the form of nitrates were weighed and dissolved in DI water. In another beaker, a stoichiometric amount of titanium (IV) butoxide (Ti(OBu)4) was mixed together with reagent-grade ethylene glycol (EG), and citric acid...
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Ocena wpływu dawki DME na wybrane wskaźniki procesu spalania w dwupaliwowym silniku o zapłonie samoczynnym
PublicationPrzedmiotem rozprawy jest analiza wpływu różnej ilości odparowanego DME wprowadzonego do kolektora dolotowego na wybrane wskaźniki spalania DME/ON dla wielu punktów pracy, turbodoładowanego silnika o zapłonie samoczynnym. Jako punkty pracy silnika, wybrano punkty najbardziej reprezentujące cykl jazdy WLTP dla samochodu Volkswagen Golf IV. Analizę procesu współspalania przeprowadzono z wykorzystaniem danych pomiarowych, uzyskanych...
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Notizie da Palazzo Albani: rivista annuale di storia e teoria delle arti
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Annali di Scienze Religiose. International Journal of Religious Scholarship with an Annotated Bibliography of Ambrosian Studies
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Atti Accademia Peloritana dei Pericolanti-Classe di Scienze Fisiche Matematiche e Naturali
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Iwona Nowakowska dr
PeopleAssistant Professor at The Maria Grzegorzewska University Institute of Psychology. Graduate of Psychology (University of Warsaw, 2019), and PhD in this field (Maria Grzegorzewska University, 2022). Conducted research in the fields of: social and clinical psychology and individual differences. Her current research activity concentrates on prosociality (volunteering, philanthropy, socially responsible behaviors) and their correlates. She...
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SPIE International Conference on Multimedia Storage and Archiving Systems
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Bogdan Kosmowski dr hab. inż.
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Janusz Rachoń prof. dr hab. inż.
PeopleSprawował urząd rektora w latach 2002-2008 Urodził się 11 sierpnia 1946 r. w Nowym Sączu. Studia wyższe ukończył w 1969 r. na Wydziale Chemicznym Politechniki Gdańskiej, uzyskując tytuł magistra inżyniera chemika. W 1969 r. rozpoczął pracę na Wydziale Chemicznym Politechniki Gdańskiej, na którym uzyskał w 1975 r. doktorat, a w 1985 r. habilitację. Na stanowisko docenta został powołany w 1989 r., na stanowisko profesora nadzwyczajnego...
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Application of gas chromatography to the analysis of spirit-based alcoholic beverages
PublicationSpirit-based beverages are alcoholic drinks, which production processes are dependent on the type and origin of raw materials. The composition of this complex matrix is difficult to analyze and scientists commonly choose a gas chromatography techniques for this reason. With a wide selection of extraction methods and detectors it is possible to provide qualitative and quantitative analysis for many chemical compounds with a various...
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N-acylpeptides with glucosamine-6-phosphate synthase inhibitors - synthesisand antifungal activity
PublicationOpracowano syntezę kilku peptydów (di i tripeptydów) zawierających inhibitory syntazy glukozamino-6-fosforanu oraz przeprowadzono je w N-acylopochodne (acetylowe, heksanoilowe, dekanoilowe) oraz zbadano ich aktywność przeciwgrzybową w stosunku do szczepów Candida albicans z opornością wielolekową. Stwierdzono, że N-acylopeptydy wykazują aktywność przeciwgrzybową oraz określono wartości MIC.
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Oxidation step in the preparation of benzocamalexin: The crystallographic evidence
PublicationThe study of oxidation step in the preparation of benzocamalexin by the α-amidoalkylation–oxidation sequence revealed the formation of perchloro-1,2-phenylene dibenzoate as the product of transformation of tetrachloro- 1,2-benzoquinone applied as the oxidant. The structures of benzocamalexin and perchloro-1,2-phenylene dibenzoate were confirmed by X-ray diffraction analysis. The extraction step in the final isolation of benzocamalexin...
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Aleksandra Karpus dr inż.
PeopleAleksandra Karpus jest absolwentką Matematyki Stosowanej na Wydziale Fizyki Technicznej i Matematyki Stosowanej oraz Informatyki na Wydziale Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej. W latach 2011-2014 pracowała z danymi w przemyśle, wykorzystując bazy danych Oracle. Od 2014 roku jest zawodowo związana z Politechniką Gdańską, obecnie jest zatrudniona na stanowisku adiunkta naukowo-dydaktycznego w Katedrze...
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Obyś cudze dzieci uczył! Magia zawodu czy przekleństwo wszech czasów? Na wstępie od redaktorki – bardzo osobiście [Teaching as such. A glamorous profession or a curse of all time? Some introductory remarks from the editor]
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LINKS Rivista di letteratura e cultura tedesca Zeitschrift für deutsche Literatur- und Kulturwissenschaft
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Le Moyen Français. Revue d'études linguistiques et littéraires fondée par Giuseppe di Stefano
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A Reaction of Thioamides with Zinc Ammoniates Leading to Simple Amidines. Discovery of a New Zwitterionic Monomethylamidine
PublicationThe reaction of thioamides with the R1R2N-ZnCl ammoniates leads to N-mono-, N,N'-di-, N,N-disubstituted, and unsubstituted amidines with high concns. of amines in abs. ethanol. The efficient direct formation of the N,N'-dimethylamidine can be explained by a greater reactivity of methylamine compared with dimethylamine. Discovery of a new zwitterion (induced by a carbonyl oxygen) suggests that the stabilization in the thymine...
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Convenient Syntheses of N-Methylthioamides: A Migration of the H2S Molecule in the Thioamide-nitrile System
PublicationThe reaction of thioamides with the R1R2N-ZnCl ammoniates leads to N-mono-, N,N'-di-, N,N-disubstituted, and unsubstituted amidines with high concns. of amines in abs. ethanol. The efficient direct formation of the N,N'-dimethylamidine can be explained by a greater reactivity of methylamine compared with dimethylamine. Discovery of a new zwitterion (induced by a carbonyl oxygen) suggests that the stabilization in the thymine...
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Direct solid phase microextraction combined with gas chromatography – Mass spectrometry for the determination of biogenic amines in wine
PublicationA direct method based on immersion solid phase microextraction (DI-SPME) gas chromatography mass-spectrometry (GC-MS) was optimized and validated for the determination of 16 biogenic amines in Polish wines. In the analysis two internal standards were used: 1,7-diaminoheptane and bis-3-aminopropylamine. The method allows for simultaneous extraction and derivatization, providing a simple and fast mode of extraction and enrichment....
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Applications of semi-definite optimization in quantum information protocols
PublicationThis work is concerned with the issue of applications of the semi-definite programming (SDP) in the field of quantum information sci- ence. Our results of the analysis of certain quantum information protocols using this optimization technique are presented, and an implementation of a relevant numerical tool is introduced. The key method used is NPA discovered by Navascues et al. [Phys. Rev. Lett. 98, 010401 (2007)]. In chapter...
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Mariusz Jaczewski dr inż.
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Towards a Framework of Operational-Risk Assessment for a Maritime Autonomous Surface Ship
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A risk comparison framework for autonomous ships navigation
PublicationMaritime autonomous surface ships (MASS) may operate in three predefined operational modes (OM): manual, remote, or autonomous control. Determining the appropriate OM for MASS is important for operators and competent authorities that monitor and regulate maritime traffic in given areas. However, a science-based approach to this respect is currently unavailable. To assist the selection of the proper OM, this study presents a risk-based...
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Krzysztof Jan Kaliński prof. dr hab. inż.
PeopleKrzysztof J. Kaliński completed his MSc study at Gdańsk University of Technology (GUT) Faculty of Production Engineering (1980, result – get a first). He obtained PhD at GUT Faculty of Machine Building (1988, result – get a first), DSc at GUT Faculty of Mechanical Engineering (ME) (2002, result – get a first), and professor’s title – w 2013 r. In 2015 r. he became full professor.His research area includes: theoretical and applied...
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Optimization of Polycrystalline CVD Diamond Seeding with the Use of sp³/sp² Raman Band Ratio
PublicationThe influence of various nanodiamond colloids used for seeding nondiamond substrates in microwave plasma enhanced chemical vapour deposition diamond process was investigated. Colloids based on deionized water, isopropanol alcohol and dimethyl sulfoxide (DMSO) were used with different grain size dispersion: 150, 400 and 35 nm, respectively. The influence of growth time was also taken into consideration and bias enhanced nucleation....
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Interrelationship between total volatile organic compounds emissions, structure and properties of natural rubber/polycaprolactone bio-blends cross-linked with peroxides
PublicationNatural rubber/polycaprolactone (NR/PCL) bio-based blends with different organic peroxides were prepared using an internal batch mixer and subsequently cross-linked at 170°C. Two types of commonly used organic peroxides, dicumyl peroxide and di(tert-butylperoxyisopropyl)benzene peroxide, were applied as free-radical initiator. Cross-linking efficiency of NR/PCL blends were investigated using oscillating disc rheometer measurements,...
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Modern solutions in the field of microextraction using liquid as a medium of extraction
PublicationThe monitoring of compounds present in samples at trace/ultra-trace level usually requires a preliminary step of isolation and/or enrichment of analytes. Against, sample preparation is considered as crucial part of whole analytical procedures, in particular in samples characterized by complex matrices composition. Several new miniaturized extraction techniques is introduced and extensively applied to different type of samples....
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Bollettino della Societa per gli studi storici, archeologici ed artistici nella provincia di Cuneo
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Annali della Pontificia Insigne Accademia di Belle Arti e Lettere dei Virtuosi al Pantheon
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Sensitive simultaneous determination of 19 fluorobenzoic acids in saline waters by solid-phase extraction and liquid chromatography–tandem mass spectrometry
PublicationA solid-phase extraction (SPE) procedure using C18 stationary phase was optimized for the preconcentration of 19 fluorinated derivatives of benzoic acid (FBA): mono-, di-, tri-, and tetrafluorosubstituted in the ring, trifluoromethylbenzoic acid and 3,5-bistrifluoromethyl benzoic acid from undiluted salt-rich (>20%) reservoir waters. Quantitative (>90%) retention/elution of 16 out of 19 analyte compounds was achieved allowing a...
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Peptide Permeases in Candida albicans
PublicationAims: The aim of this work was to characterize oligopeptide uptake in Candida albicans mutants in which the genes encoding putative peptide permeases were selectively disrupted. Initial velocities of transport of model oligopeptides, (Ala)2, (Ala)3, (Ala)4, and sensitivity of mutants to antifungal oligopeptides containing N3-(4-methoxyfumaroyl)-L-2,3-diaminopropanoic acid (FMDP) were determined and compared to those of the wild-type...
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New achievements in the field of extraction of trace analytes from samples characterized by complex composition of the matrix
PublicationWithout any doubt, the monitoring of compounds present in samples at trace or ultra-trace level usually requires a preliminary step of isolation and/or enrichment of analytes due to the fact that majority of analytical techniques are not sensitive enough for direct determination of trace compounds. On the other hand, sample preparation is considered as crucial part of whole analytical procedures, in particular in samples characterized...
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Local ordering of nano-structured Pt probed by multiple-scattering XAFS
PublicationW pracy przedstawiono wyniki analizy MS EXAFS krystalicznej platyny i nanostruktur platyny (klastry o rozmiarach od 1nm do 7nm). Rezultaty analizy masowej platyny (uwzględniające rozkłady dwu i trój-ciałowe) są zgodne z wcześniejszymi danymi strukturalnymi i wibracyjnymi i stały się podstawą do realistycznej analizy EXAFS nanocząstek Pt realizownej w połączeniu z wynikami pomiarów TEM, SEM i XRD. Badaniom poddano nanocząstki Pt...
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Local atomic order in low Pt-content nanocatalysts investigated in situ by XAS
PublicationThe unique features of X-ray absorption spectroscopy allow investigations of nanosized catalysts for fuel cells under working conditions. We present the results of an experiment carried out on a low Pt content electrocatalyst supported by a mesoporous heteropolyacid salt and used at the cathode of a proton exchange membrane fuel cell (PEMFC). The analysis of the EXAFS signal at the Pt L3-edge indicates that upon operating the fuel...
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EXAFS analysis of bismuth atom neighbourhood in reduced bismuth silicate glass
PublicationPraca zawiera wyniki strukturalnej analizy EXAFS niemodyfikowanego szkła bizmutowo-krzemianowego o składzie 0.4Bi2O3 0.6SiO2 oraz jego modyfikowanych w atmosferze gorącego wodoru form. Przedstawiono wpływ czasu redukcji na strukturę rozważanego szkła. Wyniki wskazują na silną tendencję do aglomeracji neutralnych atomów bizmutu w metaliczne nanostruktury.